Well as I sadly have a great fear of death, I guess the human stampede because it'd be a terrible way to go, and much more likely than the other options. Plus, however unlikely, there's always a slim chance you could escape from the leopard/jaguar.

Being stranded in the middle of the ocean, or stranded in the middle of the desert.

Indominus. That thing is a programmed killer. Sure Spinosaur did the unthinkable in JP 3, but Indominus would have as well if Blue hadn't intervened. And even then it took a Rex, a Raptor, and a Mosasaur to kill the darn thing. Not to mention all the dinosaurs and people Indominus killed.

Which is scarier: Jurassic World Fallen Kingdom ending up terrible or Rexy and Blue both dying in Fallen Kingdom?